Suction nozzle



March 18, 1941. A FORSBERIG 2,235,674

SUCTION NOZZLE Filed Nov. 18, 1958 2 Sheets-Sheet l vv qww-v IWWfiJNVENTOR.

' gATToRNEY.

March 18, 1941. FQRSBERG 2,235,674

SUCTION NOZZLE Filed Nov. 18, 1938 2 Sheets-Sheet 2 W v Vi INX/E TOR. BY

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ntenldl W, 1941 STATS Application November it, was, Serial No.24ll,2ll'l in Germany November 119, 11937 3 iZlaims. (ill. 15-4155) Myinvention relates to vacuum cleanersa nd more particularly to animproved suction nozzle.

In accordance with the present invention a nozzle is provided. having anelongated suction opening adapted for use in removing ordinary dust anddirt from a rug, or other surfaces to be cleaned, and which is providedwith a pivoted member which may be swung into a position for reducingthe effective cross-sectional area of the nozzle opening. This serves toconcentrate the air flow at a comparatively small area, thus making thenozzle effective ior removing threads, dog or cat hairs, or othersmaller objects which adhere tenaciously to the surfaces being cleaned.

In order to reduce the effective cross-sectional area of the nozzle thepivotal member is arranged to be swung into such a position that itblocks a considerable proportion of the area of the nozzle opening. Whenin this position the'effect of the suction is to retain it, thusreducing the ease with which it may be returned to its originalpositionwhen it is desired to make use of the full cross-section of the nozzle.opening.

in accordance with the present invention, means are provided whereby thestrongsuction which tends to hold the pivoted member in a positionreducing the cross-sectional area-of the nozzle opening is broken bymerely lifting the nozzle 'from the surfaces being cleaned, therebypermitting thefimember. to be returned toits inoperative-position.

-lFurtherobjects and advantages of my inven- --tion will be:apparentf-rom the following description; considered in connection withthe :accompanying drawings which form part of this specification and ofwhich;

Fig. Us a bottom'view of a nozzle in accordance with the presentinvention:

Fig. 2 is a cross-sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a view similar to Fig. 1, but with certain parts in adifferent position;

Fig. 4 is a cross-sectional view taken on the line L4 of Fig. 3;

Fig. 5 is a bottom view of a portion of a nozzle in accordance with asecond embodiment of my invention;

Fig. 6 is a cross-sectional view taken on the line 6-5 of Fig. 5; and

Fig. 7 is a cross-sectional view taken on the line 1-1 of Fig. 5.

Referring more particularly to Figs. 1 through 4, reference characterI!) designates a nozzle body which is formed with an elongated suctionopening M. Thi opening is bounded in part by forward lips Ill and it andrear. lips All and it, the ends of lips it and it and lips ill and itbeing joined together at the ends of the nozzle.

Rotatably secured. to the nozzle. body ill is a hollowcylindrical-member it formed with an opening Illwhich establishescommunication between the interior of thebody it and the interior of themember it. Secured to'the member lb and communicating therewith isaconnecting member l8, the opposite end of which is adapted 10 toreceive a conduit leading to a source of suction. i i

When the nozzle is. placed with the lips on a surface to be cleaned, thespace between the forward lips l2 and i3 provides a narrow slot l9.Between the lips l2 and it and between the lips l3 and I the depth ofthe interior of the nozzle body is indicated by the distance a, whileopposite the slot E9, the depth of the interior of the nozzle body islimited only by the member 06.. Between the rear lips l4 and I 5 thereis pivotally mounted a member 2|]. This member is formed with a lip 2!which, when the member is in the position shown in Figs. 1 and 2, formsa continuation of the rear lips M and 15. Member is formed with acentral opening-22 and this opening, on the opposite side of the memberfrom the lip 2|, is completely bounded by a lip 23.

The lateral dimension of the member 20 is such that, when it is swung tothe position shown in Figs. 3 and 4, a narrow passageway 24 is formedbetween the edge Of mGmbBI' 20 and the inner wall of the nozzle body 10,this passageway communicating with the'aforesaid slot. l9. 2 Member 20issIightly longer. than the deep central por-.- tion of the nozzle andconsequently, when the member 2.0 is in the position shown in Figs. 3and 4, it blocks ,off flow to the central portion from the shallow endportions. The extent of lip 23 is such that, when the member 2fl'is'inthe position as shown in Figs. 3 and 4, this lip raises the forward lipsI? and i3 of the nozzle slightly away from the surface. Thus, it isassured that the lip 23 is held against the surface being cleaned andtends to prevent the fiow of air into the nozzle through the opening 22,thus causing substantially all of the air to flow through the narrowpassage 24.

. However, when the nozzle is lifted bodily from the surface, air mayflow into the nozzle body through the openin 22, and this opening islarge enough so that the flow of air therethrough is sufficient to breakthe suction which would otherwise tend to hold the member 20 within theopening I I. Due to the location of the pivots upon which the member 20is mounted, when the nozzle is raised from the floor and the suctionbroken as aforesaid, the member 20 swings in the direction of the arrowshown in Fig. 4 to a position somewhat beyond the vertical. If thenozzle is then lowered towards the floor before the member 20 has achance to swing back, the

member 20 is caused to take the position shown in Figs. 1 and 2. Inorder to pivot the member 10 20 from this position to the position shownin Figs. 3 and 4, the nozzle is again raised from the floor, whereupongravity causes the member to pivot as indicated by the arrow in Fig. 2.

In th embodiment shown in Figs. through '7,

15 similar parts are designated by the same reference characters as inFigs. 1 through 4. This embodiment differs from that above described inthat the pivoted member, here designated by reference character 25 doesnot itself completely form the opening 22, but this opening is in pantbounded by a lip 16 which is part of the nozzle body .ID. The member ispivoted to opposite ends of the lip 26 by means of pins 21. The downwardextension of lip 26 is such that it con- 2} facts the surface beingcleaned and hence prevents .the flow of air through the opening 2| whenthe nozzle is against such surface. The lip 28, which surrounds thatportion of the opening 22 which is bounded by the member 25 alsocontacts 30 the surface being cleaned when the member 25 is in theposition shown, thus musing substantially all of the air to pass throughthe passage 24. The operation of this embodiment is similar to thatdescribed above in connection with the 35 embodiment shown in Figs. 1through 4 and hence need not be repeated.

While I have shown two more or less specific embodiments of myinvention, it is to be understood that this has been done for purposesof 40 illustrations only and that my invention is not.

limited thereto but the scope thereof is to be determined by theappended claims.

I claim: 1. In a suction nozzle for cleaning a surface, 45 a hollow bodyformed with a cleaning opening bounded by lips, and a member movablewith relation to said body from a position outside said opening to aposition reducing the effective crosssectional area of said opening, thedimensions 60 of said member being such with respect to those of saidopening that when the member is in the second-mentioned position thereis provided a small opening between said member and one of said lips,the portion of said lip adjacent to said small opening being cut away toprovide a passage for flow of air over said sinface and into said smallopening, said member having a passage forming an auxiliary air inlet tosaid hollow body whensaid member is in the second-mentioned position andspaced from said surface, the material bounding said auxiliary inlet onthe side thereof which is adjacent to said surface when the member is insaid second-mentioned position 5 extending downwardly to contact saidsurface when the nozzle is in operative position on the surface.

2. In a suction nozzle for cleaning a surface, a hollow body formed witha cleaning opening bounded by lips, a member movable with relation tosaid body from a position outside said opening to a position within theopening, the dimensions of said member being such with respect to thoseof said opening that when the member is in the second-mentioned positionthere is provided a small opening between said member and one of saidlips, the portion of said lip adjacent to said small opening being cutaway to provide a. passage for flow of air over said surface and intosaid small opening, said mem ber having a passage forming an auxiliaryair inlet to said hollow body when said member is in thesecond-mentioned position and spaced from said surface, and a rim onsaid member 5 around said auxiliary inlet on the side thereof which isadjacent to said surface when the member is in said second-mentionedposition, said rim extending downwardly to contact said surface when thenozzle is in operative position on the surface.

3. In a suction nozzle for cleaning a surface, a. hollow body formedwith a cleaning opening bounded by lips, a member movable with relationto said body from a position outside said opening to a position withinthe opening, the dlmensi-ons of said member being such with respect tothose of said opening that when the member is in the second-mentionedposition there is provided a small opening between said member and oneof said lips, the portion of said lip adjacent to said small openingbeing cut away to provide a passage for flow of air over said surfaceand into said small opening, said member together with another of saidlips bounding a passageway which forms an auxiliary air inlet .to saidhollow body when the member is in the secondment-ioned position andspaced from said surface, and a rim on said member around the portion ofsaid auxiliary inlet which is bounded by said member, said rim being onthe side of the member which is adjacent to said surface when the memberis in said second-mentioned position and extending downwardly to contactsaid surface when the nozzle is in operative position on 5 the surface.

AXEL ALBERT FORSBERG.

